January 2015 - Users - libvirt List Archives

[libvirt-users] live migration taking forever
by Xu (Simon) Chen 27 Jan '15

27 Jan '15

Hey folks, I am running libvirt 1.2.4 and qemu 2.1 on a 3.14.27 kernel. I've found that live migrating a relatively large VM (16 cores and 64G ram) is taking forever - close to 15 hours now, and still not done... With "lsof -i", I can see a connection is established from my source hypervisor to a target hypervisor, likely for the purpose of copying data. nettop shows that this connection is constantly sending 50-60MBps traffic. The VM being migrated has a disk on ceph by using librbd. I wonder if anyone has seen similar issues, and how I could troubleshoot further. (I tried but failed to get qemu monitor to work on the VM...) Thanks. -Simon

4 3

[libvirt-users] Probem with Windows 2012 R2 server
by Dominique Ramaekers 26 Jan '15

26 Jan '15

Hi, I'm having a lot of trouble with a Server 2012R2 evaluation version. I'm testing it to see how good it works in libvirt-kvm. It seems the server won't run longer than a few days. After a few days, when I shut down the server, she won't start again. Has anybody have experienced the same??? My Windows 8.1, and Linux VM's works perfectly... Greetings

1 0

[libvirt-users] questions around using numatune/numa/schedinfo
by Chris Friesen 26 Jan '15

26 Jan '15

Hi, I'm running into some problems with libvirt and hoping someone can point me at some instructions or maybe even help me out. First, are there any requirements on qemu version in order to use the "numatune" and/or "cpu/numa/cell" elements? Or do they use cgroups and not the native qemu numa support? Second, are there any instructions on how to set up cgroups? I initially hadn't had cgroups mounted and running "virsh schedinfo <domain>" gave an error. So I mounted "/sys/fs/cgroup/memory" and "/sys/fs/cgroup/cpu" and restarted libvirtd but running "virsh schedinfo <domain>" still gives an error: root@compute-1:~# virsh schedinfo 8 Scheduler : Unknown error: Requested operation is not valid: cgroup CPU controller is not mounted What am I missing? Thanks, Chris

3 3

[libvirt-users] libvirt + xen assertion
by CloudPatch Staff 22 Jan '15

22 Jan '15

We're hitting an assert whenever we try to create an HVM instance under Xen via libvirtd. System is running on Gentoo, package information as follows: app-emulation/xen-4.5.0 USE="api debug flask hvm pam pygrub python qemu screen" app-emulation/xen-tools-4.5.0 USE="api debug flask hvm pam pygrub python qemu screen" app-emulation/libvirt-1.2.11-r2:0/1.2.11 USE="caps libvirtd lvm macvtap nls qemu udev vepa virtualbox xen" The following commands are run in parallel: vmmachine ~ # libvirtd --listen 2015-01-22 16:33:13.596+0000: 2620: info : libvirt version: 1.2.11 2015-01-22 16:33:13.596+0000: 2620: error : udevGetDMIData:1607 : Failed to get udev device for syspath '/sys/devices/virtual/dmi/id' or '/sys/class/dmi/id' libvirtd: libxl_fork.c:350: sigchld_installhandler_core: Assertion `((void)"application must negotiate with libxl about SIGCHLD", !(sigchld_saved_action.sa_flags & 4) && (sigchld_saved_action.__sigaction_handler.sa_handler == ((__sighandler_t) 0) || sigchld_saved_action.__sigaction_handler.sa_handler == ((__sighandler_t) 1)))' failed. Aborted vmmachine ~ # VIRSH_DEBUG=0 virsh create xml create: file(optdata): xml libvirt: XML-RPC error : End of file while reading data: Input/output error error: Failed to create domain from xml error: End of file while reading data: Input/output error libvirt: Domain Config error : Requested operation is not valid: A different callback was requested

1 0

[libvirt-users] openvswitch port with no ip
by Yaron Illouz 21 Jan '15

21 Jan '15

I used openvswitch with virt-intall I defined a network <network> <name>private</name> <bridge name='virbr0'/> <forward mode='bridge'/> <virtualport type='openvswitch'/> </network> But get no ip for the ovs port when I launch the instance. Is this correct? ci-info: +++++++++++++++++++++++++Net device info++++++++++++++++++++++++++ ci-info: +--------+------+--------------+-------------+-------------------+ ci-info: | Device | Up | Address | Mask | Hw-Address | ci-info: +--------+------+--------------+-------------+-------------------+ ci-info: | lo | True | 127.0.0.1 | 255.0.0.0 | . | ci-info: | eth1 | True | . | . | 52:54:00:24:16:29 | ci-info: | eth0 | True | 172.16.5.136 | 255.255.0.0 | 52:54:00:44:01:28 | In the bridge port vnet1 get assigned to virbr0 Bridge "virbr0" Port "virbr0" Interface "virbr0" type: internal Port "vnet1" Interface "vnet1" And i launch the instance the following way virt-install --name probe9 --ram 4096 --vcpus=4 --check-cpu --os-type=linux --import --disk /data/KVM/Probe2-cloud3.qcow2,format=qcow2 --network network=ext --network network=private --graphics vnc,listen=0.0.0.0 --noautoconsole --disk vol=default/configuration2.iso,bus=virtio Regards

2 1

Re: [libvirt-users] [libvirt] libvirt 1.2.10 and latest EL6 qemu-kvm
by Kashyap Chamarthy 20 Jan '15

20 Jan '15

[Dropping libvir list and adding libvir-users list.] On Mon, Jan 19, 2015 at 04:12:46PM +0100, liedekef(a)telenet.be wrote: > Hi all, > > I had libvirt 1.2.10 running without issues together with the qemu package > qemu-kvm-0.12.1.2-2.415.el6_5.14.x86_64.rpm That's a really old QEMU and the libvirt you're using is relatively newer. > Now, after updating my server, qemu-kvm became version > qemu-kvm-0.12.1.2-2.448.el6_6.x86_64 > > And as a result, when doing 'virsh start' (virsh define worked ok), the following error occured: > > 2015-01-19 15:05:26.539+0000: 4347: error : qemuMonitorJSONCheckError:379 : internal error: unable to execute QEMU command 'qom-list': The command qom-list has not been You seem to be hitting this bug (although the bug is for RHEL7, looks like the same behavior): https://bugzilla.redhat.com/show_bug.cgi?id=1082124 Where Michal Privoznik says, it should already be fixed with these commits in libvirt: 730af8f2cd7bc0e4c98b97200857909f42ea817f -- qemuMonitorJSONGetCPUx86Data: Don't fail on ancient qemus 84f69602143551433e3e0a5226dc572ecb33c059 -- qemu: Check for presence of device and properities when getting CPUID a6a6f84af92a506f83fdecf56f292bcb89905492 -- qemu: Change return type of qemuMonitorGetGuestCPU() > > The only thing I could do (even downgrading libvirt to 1.2.9 didn't > work), was to downgrade qemu-kvm to the older version again ... Any > hints on this? For the EL distrubtione you're using, I think using whatever the newest supported combination of libvirt and QEMU should help. -- /kashyap

2 2

[libvirt-users] Guests using more ram than specified
by Dennis Jacobfeuerborn 19 Jan '15

19 Jan '15

Hi, today I noticed that one of my HVs started swapping aggressively and noticed that the two guests running on it use quite a bit more ram than I assigned to them. They respectively were assigned 124G and 60G with the idea that the 192G system then has 8G for other purposes. In top I see the VMs using about 128G and 64G which means there is nothing left for the system. This is on a CentOS 7 system. Any ideas what causes this or how I can calculate the actual maximum amount of RAM I can assign to the guests on a HV without overcommitting RAM? Regards, Dennis

3 3

[libvirt-users] volume can't be attached after libvirt upgrade
by Chengyuan Li 19 Jan '15

19 Jan '15

Hi, My nova-compute nodes was running libvirt 0.9.13 and QEMU 1.0, after libvirt was upgraded to 1.2.2, the VMs launched by libvirt 0.9.13 can't attach volume any more, i.e. "nova volume-attach <vm-uuid> <volume-uuid>" doesn't work. But before the libvirt upgrade, the same VM can attach volume disk. I did some debuging and find that, it failed in QEMU when try to open the volume device, and the return errno is EPERM. QEMU instances is running as user libvirt-qemu always, so is that possible some problem in Linux capabilites or libvirt apparmor? ------------------------------------- int qemu_open(const char *name, int flags, ...) { int ret; int mode = 0; long euid, egid; if (flags & O_CREAT) { va_list ap; va_start(ap, flags); mode = va_arg(ap, int); va_end(ap); } euid = (long)geteuid(); egid = (long)getegid(); #ifdef O_CLOEXEC ret = open(name, flags | O_CLOEXEC, mode); #else ret = open(name, flags, mode); if (ret >= 0) { qemu_set_cloexec(ret); } #endif return ret; } Regards, CY.

1 1

[libvirt-users] Suggest to update python binding information on libvirt.org
by Lingyu Zhu 19 Jan '15

19 Jan '15

Hello. I am new libvirt user. I downloaded and compile the source code with default configuration. I had a lot of trouble before finally found out that python bindings is now a separated package. However the web site still states that python binding is directly supported, and that install extra binding package when libvirt is installed as a binary package. Please consider updating this misleading information. Regards Lingyu Zhu

2 3

[libvirt-users] [libvirt]configuration question about usinf for [xen4.5][libxl]
by Doug McMillan 17 Jan '15

17 Jan '15

What configuration should be set in a custom compiled libvirt to get the most out of the xen libxl? [ -f Makefile ] || ./configure --prefix=/usr --libexec=/usr/lib/"$pkgname" --sbindir=/usr/bin \ --with-storage-lvm=yes --with-udev=yes --without-hal --disable-static \ --with-init-script=systemd --with-systemctl=yes --with-systemd-daemon=yes \ --with-qemu-user=nobody --with-qemu-group=nobody \ --without-netcf --with-interface --with-lxc --with-storage-iscsi \ --with-xen=yes --with-libxl=yes # --with-audit After compiling what needs done to configure libvirt to work with xen libxl because all I seem to be getting is: error: failed to connect to the hypervisorerror: no connection driver available for //libxl[dragon@archxen ~]$

1 0